Describing Biodiversity
This formula is used to calculate Diversity in ecosystems
Simpsons Diversity Index
Which trophic level does a primary consumer occupy?
Second
Identify the complementary DNA strand
TAG CCA GTC
ATC GGT CAG
Small-scale variation of allele frequencies within a species or population in which the descendant is of the same taxonomic group as the ancestor.
Microevolution
This species is characterised by having only a few offspring but investing high amounts of parental care
K- Selected Species
Define Keystone Species
A keystone species is a species that has a disproportionately large impact on the environment relative to its abundance
What process results in the production of four diploid cells?
Meiosis
This mode of speciation occurs when a physical barrier separates populations, preventing gene flow.
Allopatric speciation
What mnemonic do we use to remember the Linnean system of classification? What does it stand for?
Dear King Philip Came Over For Great Spaghetti
Domain Kingdom Phylum Class Order Family Genus Species
Define carrying capacity
The maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available
What is the purpose of PCR
To amplify specific segments of DNA
This type of natural selection favours the average phenotype and reduces variation in a population
stabiling selection
A group of organisms that consists of a common ancestor and all its lineal descendants
Clade
Explain how carrying capacity is limited by food availability
There may not be enough food for the whole population, causing some organisms to die off, therefore changing the carrying capacity of the population.
What is the role of Helicase in DNA replication
To unzip the DNA strand by breaking hydrogen bonds
This pattern of diversification occurs when two unrelated species develop similar traits because they live in similar environments
Convergent evolution.
What 2 measurements is Spechts classification based on?
Ground/canopy cover and height of the tallest stratum
Explain primary and secondary succession
In primary succession, newly exposed or newly formed rock is colonised by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonised following the disturbance
Down syndrome is caused by Trisomy 21.
Explain the term Trisomy 21
A population of birds was observed to have individuals with very short and very long wings, with very few birds observed with medium sized wings
What type of selection is shown here?
Disruptive selection